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phy 201
Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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2 Questions
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Based off the simulation of motion in the gravitational field of the earth and the conservation of energy on an incline
You may if you wish do the remainder of this experiment using your data from the experiment 'Uniformity of Acceleration for a Ball on a Ramp' (that experiment is in turn a continuation of the experiment Ball and Ramp Projectile Behavior, which preceded it). In those experiments you set up '2-, 3- and 4-domino ramps' and carefully observed the range of the ball as it rolls down and off the ramp. Based on the ranges and the vertical drop, you used the data analysis program to determine the speed of the ball at the end of the ramp.
If you have only the 15-cm ramp then you would have used half the specified number of dominoes (i.e., 1 domino instead of the specified 2, and 2 dominoes instead of the specified 4), and your 10, 20 and 30 cm rolls were probably 5, 10 and 15 cm).
The data program requests the number of dominoes, from which it calculates a slope based on a 30-cm ramp. A 15-cm ramp has only half the 'run' of a 30-cm ramp, so if you used a 15-cm ramp you would enter double the number of dominoes you actually used. That is, if you use 1 domino on a 15-cm ramp, tell the program you used 2; if you used 2 dominoes tell the program you used 4. If you happened to use 3 or 4 dominoes, you would tell the program you used 6 or 8, respectively.
If not, you should review the instructions for those experiments, set up ramps with 2 and 4 dominoes (1 and 2 dominoes if using a 15-cm ramp). Using 5 trials you should obtain horizontal ranges for the ball rolling distances of 15 cm and 30 cm along each ramp (use 7.5 and 15 cm if you have only the 15-cm ramp), and calculate the mean and standard deviation of ranges for each set of 5 trials. You will have a total of 4 five-trial means and standard deviations to report.
If you use the data from the experiments you will have information for 10, 20 and 30 cm rolls on 2- and 4-domino ramps, for a total of 6 five-trial means and standard deviations, which you will have reported once already (you should report once more).
In the space below report in the first line the number of dominoes, the distance of the roll down the ramp, and the mean and standard deviation of the horizontal range for your first setup. In the second line report the same information for your second setup, etc., until you have reported your results for all of your setups (4 setups if you obtained new data for the experiment, 6 setups if you used your old data). In the first subsequent line, give the distance the ball fell after leaving the end of the ramp.
-------->>>> 10, 20, 30 cm rolls 2 and 4 dom; report # dom, dist, mean and std dev of horiz range first ramp; same reversed ramp; then 2d, then if present 3d; also vert dist of fall
Your answer (start in the next line):
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I dont know how to get a velocity of around one hundred on the gravitation of the earth ive modified impulse from 100 to 10000 but nothing nothing changes it that much. And with the conservation of energy on an incline I dont understand how to do the part of the experiment with the dominoes I dont understand how to set it up Im a little confused
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With respect to the gravitational simulation, I need to know exactly what you are doing, keystroke by keystroke and click by click.
Note that the velocity isn't supposed to be 100, the difference in the maximum and minimum velocities in the orbit is supposed to be less than 100.
Try this:
Start the program. Hit 'run'. Click on 'Impulse 1000'. Click on 'Forward'. Tell me what happens.
Then send me a copy of the instruction you're attempting to follow, and give me the details of how you have set the situation up.
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For the ramp and dominoes, the setup is very similar to that of the experiment you submitted earlier, posted at
file:///C:/labrynth_2/levl1_13/levl2_10/10-14-2012_____ball_and_ramp_projectile_behavior.htm
You put dominoes under one end of the 30-cm ramp and let the ball roll from rest for the specified distance. You can ignore everything about the 15-centimeter ramp, which is not relevant here since you do have the 30-centimeter ramp.
You measure the horizontal displacement of the ball from the time it leaves the end of the ramp until it hits the floor, and you use this data to determine the ball's velocity at the end of the ramp.
Review what you did on that experiment, then use those techniques to analyze your data for this experiment.
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Let me know if I haven't answered your questions. Keep asking until you understand, but be sure you always give me as much detail as possible so I can focus my answer.
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